CVE-2026-40861

MEDIUM EPSS 47.1%
Published Jun 1, 20261mo ago · Modified Jun 17, 20262w ago
6.5 CVSS 3.1
Medium
Find Similar
Published Jun 1, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago

Description

A Dag author could either (a) create a symlink under their task's log directory pointing to an arbitrary file readable by the API server process (read-path attack — e.g. `/etc/passwd` or `airflow.cfg`) or (b) supply a `task_id` containing `..` sequences accepted by the Task SDK's `KEY_REGEX` (write-path attack), and in both cases the FileTaskHandler resolves the log path outside the configured `base_log_folder`, leaking or overwriting arbitrary files. Only affects deployments where the worker log folder is shared with the API server. Users are advised to upgrade to `apache-airflow` 3.2.2 or later. As a defense-in-depth mitigation, deploy the worker and API server with separate log volumes so that worker-controlled paths cannot reach the API server's filesystem.

CVSS Details

Base Score
6.5
Exploitability
2.8
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability None

Threat Intelligence

EPSS Exploit Probability
47.1% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-59

Affected Products 1

VendorProductVersionRange
apacheairflow* <3.2.2

References 3

  • openwall.com http://www.openwall.com/lists/oss-security/2026/05/31/1
    Mailing ListThird Party Advisory
  • github.com https://github.com/apache/airflow/pull/65325
    Issue TrackingPatch
  • lists.apache.org https://lists.apache.org/thread/823334db2559xjlwt59gpzjz47thnscl
    Mailing ListVendor Advisory

Remediation

  • github.com https://github.com/apache/airflow/pull/65325
    Issue TrackingPatch